n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 12 |
4 | 31 |
5 | 92 |
6 | 256 |
7 | 772 |
8 | 2291 |
9 | 7000 |
10 | 21476 |
11 | 66804 |
12 | 208935 |
13 | 658924 |
14 | 2088628 |
15 | 6656820 |
16 | 21306270 |
17 | 68468796 |
18 | 220776444 |
19 | 714117012 |
20 | 2316229821 |
21 | 7531561676 |
22 | 24545492916 |
23 | 80160031076 |
24 | 262279882239 |
25 | 859660694960 |
26 | 2822177751148 |
27 | 9278647613760 |
28 | 30547880467863 |
[1,2,4,12,31,92,256,772,2291,7000,21476,66804, 208935,658924,2088628,6656820,21306270,68468796, 220776444,714117012,2316229821,7531561676, 24545492916,80160031076,262279882239,859660694960, 2822177751148,9278647613760,30547880467863] |